Mannesmann Vdo Ag

Siemens Aktiengesellschaft

Rainer Moser

Dieter Keller

Karl Eck

Bernd Rumpf

Knut Meyer

Wolfgang Sinz

Markus Distelhoff

Ingo Mohr

Justus Kl&ouml;ker

Winfried Fr&ouml;hlich

Bernd Pauer

Bing Sun

Sigrid Heimann

Wilfried Fr&ouml;hlich

Bettina Seibert

The invention relates to a float () for a fill level sensor, comprised of a fuel-resistant plastic (), an expanding means () and/or filler (), whereby the expanding means consists of gas-filled plastic balls () that are provided in the form of microspheres (), and the filler consists of micro-hollow balls (). The microspheres () and the micro-hollow balls () are surrounded by fuel-resistant plastic ().

Float for a fill level sensor

In a fuel tank ( ) for a motor vehicle, a cap ( ) which closes off an installation opening ( ) has a metal insert ( ). The metal insert ( ) has a pressure-exerting surface ( ) which faces toward an edge ( ) which laterally delimits the installation opening ( ). This construction prevents settling of the material, which in the long term leads to leaks from the fuel tank ( ).

Fuel tank

A fuel tank for a motor vehicle comprising a wall composed of two shells arranged one above the other. The outer shell of the wall preferably has an inlet orifice and an outlet orifice. A filter element is arranged in front of the outlet orifice. Scavenging air from the inlet orifice thereby passes first into a gap between the shells and subsequently to a filter element. As a result, fuel vapors can no longer diffuse through the wall and pollute the environment.

A fuel tank for a motor vehicle, having a wall ( ) which is manufactured from plastic, in particular by injection molding, is provided on its inside with a permeation barrier ( ). The permeation barrier ( ) is manufactured from a material which is virtually impenetrable for fuel vapors. The permeation barrier ( ) is composed of shell parts ( ) which are welded to one another.

Fuel tank for a motor vehicle

In a method of producing a fuel tank from plastic, a heating element is located between two shell parts to be welded to one another. When the shell parts are pressed together, the heating element melts into the plastic and produces a weld that provides a fuel-resistant seal. The fuel tank subsequently has a particularly exact shape.

Method of producing a plastic component and fuel tank for a motor vehicle

The invention relates to a process for reducing the residual hydrogen fluoride gases in a fluorinated plastic tank, in particular in a plastic tank for a motor vehicle, in which firstly the space within the tank is subjected to a fluorination step and then, in at least one gas flushing process, the reaction products of the fluorination step are removed from the plastic tank. In a process in which the undesired reaction product hydrogen fluoride is completely eliminated and which is suitable for efficient large-scale production, after the gas flushing process, a neutralization step is carried out to bind residual fluorination gases on the inner layers of the plastic tank.

Growing community of inventors

Idstein, Germany

Rainer Moser